Device for casting elbows for stovepipes.



J. SODERBERG. v vnvmn FOR CASTING ELBOWS FOR STOVEPIPES. APPLICATION FILED MAR. 15, 1913. 1 1 7 269. Patented Nov. 17, 1914.

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1,1 17,269, Patented Nov. 17, 1914.

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z/hn -Joderer THE NORRIS PETEQS 50.. PHUm-LITHCL, WASHINGTON. D C.

JOHN SODERBERG, OF CHICAGO HEIGHTS, ILLINOIS.;

DEVICE FOR CASTING ELBOWS FOR STOVEPIPES.

Specification of Letters Patent.

- Patented Nov. 17, 1914.

Application filed March 15, 1913. Serial No. 754,474.

To all whom it may concern -Be it known that I, JOHN SODERBERG, a citizen of the United States, residing at Chicago Heights, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Devices for Casting Elbows for Stovepipes.

The object of my invention is to provide means to cheapen the production of cast iron elbows for stove pipes and render it possible to sell the same at the same or at a less cost than can corrugated stove pipe elbows be sold.

The manner in which I accomplish my object is set forth in the following specification and illustrated in the accompanying drawings, in which Figure l is a plan of sand mold which is known as the drag, with a green sand core set in position therein, with broken lines'indicating a separable core rod within said core. Fig. 2 is a plan (inverted), of the other part of a mold, known as the cope. Fig. 3 is a vertical section, on line 33 of Fig. 1, viewed in the direction indicated by the arrows. Fig. at is a plan of the pattern used in making the mold of the device. Fig. 5 is a side elevation of said pattern. Figs. 6 and 7 are plan and side elevation, respectively, of the bottom of the core box used. Figs. 8 and 9 are plan and elevation, respectively, of the top of the core box. The dotted lines in Figs. 7 and 9, respectively, indicate a vertical section midway of and parallel to the top and bottom lines of said figures. Figs. 10 and 11 are plan and elevation, respectively, of the two-part core rod of the device. And Figs. 12 and 13 are plan and elevation of four cast elbows, gate and core rod, freed from the sand of the mold.

A reference character applied to designate a given part indicates said part throughout the several figures wherever the same appears.

let indicates the bottom board, the side members of the mold flask and the cleats on the bottom board.

that part of a green prints 18. In the center of this pattern is v I the gate, 19, and core rod prints 20. The core 21 is formed in a core box consisting of two members, a' bottom 22 and top 23, (Figs. 6, 7, 8 and 9). In the bottom of the core box are two transverse channels, 24:. Supported in these channels, or at least properly positioned thereby, are the arms 25 of the core rod 31. Core rod 31 consists of the members 26 and 27. The ends of one of the members 26, 27 fit into the ends of the other of said members, and said members are joined together when said ends are so fitted and are firmly secured in said joined condition by the screw 28. When the two members 26 and 27 of the. core rod 31'are Joined together, as shown in Figs. 10 and 11, and said core box has the bottom member 22 partially filled with sand, said core rod is placed on said sand and some additional sand placed thereover. The top of the core box (23) is then put in place and the core is rammed up through the holes 29. The'bottom of the drag is filled with sand, with the pattern in place therein. On the removal of the pattern from the sand in the drag and cope the core is put in place in the mold in the drag, supported by the core prints 18. Suitable tools may be attached to the core by means of arms 25, in setting it into the mold as above described. The metal is then poured. When the casting is removed from the flask the gate, (19) is broken away from the four elbows; the core sand broken away from the screws 28, the screws released, and

. the members of the core rod, (26 and 27) are separated from each other; after whichthey are withdrawn from the elbows' Thus, by the use of a green sand core containing a two part core rod, 7 said parts arranged to be separated when desired and to be firmly secured together when necessary, and a green sand mold, and the casting of four elbows on one gate, I make the casting of said elbows a cheap and desirable operation, producing cast iron elbows as substitutes for sheet metal elbows for stove pipes.

I claim:

To cast stove pipe elbows, a pattern consisting of a plurality of elbows, core prints connecting said elbows, additional core prints, a centrallypositioned gate, and radially extending runners connecting said gate and said elbows, in combination with a core comprlsing' a core rod consisting of separable parts and green sand, said core abutments being substantial duplicates of rod provided with abutinents extending outsaid additional core prints. side of said green sand and adapted to form 7 means to handle said core, the green sand of JOHN SODLRBERG' said core which corresponds to the core In the presence 0fprints connecting said elbows being dupli- CHARLES TURNER BROWN, cates of said core prints, and said projecting JULIUS RUBINSTEIN.

fiopies 01? this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 5.2. 

